I kinda did the average thing you guys have mentioned.
Rolled some of the scores up and some down.

Couldn't have made a formula because, first i am not so good on excel and the google sheet do not exactly work the same, second not all the users have scores entered so the same formula wont apply to all board.
Plus, i have not taken average scores of less than 4 entries as it will not represent a real medium.

Anyways, these are average scores, enjoy

cheers..

ps: anyone who thinks could do better or at least give it a try, you are more than welcome, as i am not the creator of the sheet i have no authority on it whatsoever, just keep the scores real